What are the differences between Prettier and ESLint and how to use them together?

Differences and Collaboration Between Prettier and ESLint

Prettier and ESLint are two commonly used tools in frontend development. They have different responsibilities but can work well together.

Main Differences

Prettier (Code Formatter)

• Focuses on code formatting and unifying code style
• Does not perform code quality checks
• Enforces a unified code style, reducing team debates
• Regenerates code by parsing AST
• Relatively limited configuration options to avoid over-configuration

ESLint (Code Quality Checker)

• Focuses on code quality checking and identifying potential issues
• Checks for code errors, best practices, and code style
• Provides extensive rule configuration
• Supports custom rules and plugins
• Supports auto-fixing some issues

Collaborative Usage

In actual projects, Prettier and ESLint are typically used together:

1. Install Dependencies

   bash
   npm install --save-dev prettier eslint eslint-config-prettier eslint-plugin-prettier

2. Configure ESLint In .eslintrc.js:

   javascript
   {
     "extends": [
       "eslint:recommended",
       "plugin:prettier/recommended"
     ]
   }

3. Configure Prettier Create .prettierrc file:

   json
   {
     "semi": true,
     "singleQuote": true,
     "tabWidth": 2
   }

Resolving Configuration Conflicts

Using eslint-config-prettier disables all ESLint rules that conflict with Prettier, avoiding duplicate configurations and conflicts.

Best Practices

• Use Prettier uniformly for code formatting in teams
• Use ESLint for code quality checking
• Run both in CI/CD pipelines
• Configure auto-formatting and format-on-save in editors

With proper configuration, Prettier and ESLint can work perfectly together, ensuring both unified code style and code quality.